Concealed hinge of slidable extensible type



Nov. 20, 1956 s. JANNACE CONCEALED HINGE OF SLIDABLE EXTENSIBLE TYPEFiled April 50, 1951 I n venlor J); YER/O /A/V/VA CE 2v? C7 7, 7 y IAttorneys CONCEALEI), HINGE on QLIDA'BLE EXTENSIBLE TYPE SaverioJannace, Milan, Italy, assignor to Italo Rizzieri, Milan, ItalyApplication April 30, 1951, Serial No. 223,718 Claims priority,application Italy May 4, 1950 2 Claims. 01. 16-179) This inventionrelates in general to a hinge and more particularly has reference to aconcealed type of hinge of the slidable extensible type. I

An object of this invention is to provide a hinge having cooperatingslides of annular sector profile, for joining two elements of any typewhich ought to be free to turn with respect to each other through anangle greater than 90 around their adjacent corners, without interferingwith each other and without the hinge, in its closed position, beingvisable at the outside. It finds application particularly in themounting of doors for furniture, closets and cabinets in general ontheir posts, of covers and shutters on fixed frames, of automobile doorson the body frames and so on.

Said hinge comprises two plates for attachment to the elements to bejoined together, and each plate is fastened to a slide having the shapeof a sector of a cylinder, extending from the plate into the thicknessof the corresponding element to which the plate is attached. The axis ofthe slides, constituting the axis of the hinge and parallel to the edgeof said element, is located externally to the thickness of the element.The slides are slidably combined with at least one guide piece in theform of a cylindrical or annular sector, coaxial with but independentfrom the slides and positioned to extend into the thickness of theelements to be hinged through openings in the two fixing plates. Meansare provided for ensuring a constant connection between the slides andguide body and for limiting the stroke of the slides with respect tosaid body.

Said hinge is susceptible of many embodiments, one of which isrepresented only by way of non-limitative example in the accompanyingdrawings, to which the following detailed description relates. In thedrawings:

Figs. 1 and 2 are two schematic sections at right angles to the axis ofrotation of one embodiment in closed positions respectively;

Fig. 3 is a somewhat diagrammatic radial sectional view of the device ofFigs. 1 and 2, detached from the elements to be hinged; and

Fig. 4 is an elevational view of the hinge in open position.

In the represented embodiment of the invention, the hinge is intended tojoin two parts, of which one is fixed and marked F, and the other ismovable and marked'M. It appears clear, however, that the function ofthese two parts could be inverted without altering anything of What willhereinatfer be disclosed.

As shown in the drawings, the hinge is composed of two plates ofrectangular form 1 and 2, respectively, capable of being fixed toelements F and M to which are fixed curved members 1, 2', respectively,shaped as cy lindrical or annular sectors with a common axis external tothe thickness of elements F and M to be hinged together. Said curvedmembers, as it appears from Fig. 3, are spaced in the direction of theaxis 0 and project on each side of plates 1 and 2, which plates havingopenings 3 and 4 to receive said members, the shape of which UnitedStates Patent 0 5 men'ts' F and M, respectively, while their partsprojecting 2,770,834 Patented Nov. 20, 1956 2 will be described later.Members 1" and 2 are positioned, both when the hinge is closed as wellas when it is open, with their projecting par-ts rearwards of plates 1and 2 in "cylindrical segmental housings 5 and '6 of elein fron't'ofplates -1 and 2 are positioned, when "the hinge is closed, inside of thesaid housings 6 and 5, respectivel'y, after having passed throughopenings 4'an'd 3 of plates 2. and 1 p Members 1" and 2 are mountedcircularly slidably inside or intermediate slides 12 0f annular sectorprofile and which are cireula rly slidably mounted in their own "ularguides 7 and *8 machined in a guide body 9 with eyrindrieai ax is'com'rn'on to both and coinciding with 'the axis 0, the external surface ofwhich is visible only when the hinge is open. In order to render members1' and 2 invisible in this position, there are provided coveringelements 10 and 11 coaxial with guide body 9 and slidably mounted withstrong friction thereon, which reenter in the body in closed positionand can be drawn out circularly from the guide 9 by the holding actionexerted upon holders 10, 11' by plates 1 and 2. Between guide sector 9and the intermediate slides 12, as well as between the said slides andthe members 1 and 2', there are interposed engaging means consisting inpins 12' of the intermediate slides 12 and pins 1" of the members 1' and2, respectively, which engage with slots in the guide body 9 and in theintermediate slides 12, respectively, to act as stroke limiting means.

As it appears from Fig. 2, a hinge of this type allows a turning of ofelement M in respect to element F. If as represented, axis 0, besidesbeing external of the thickness of elements F and M, is also displacedin respect to their joining line L, with the turning is also obtained alateral displacement of element M in relation to element F correspondingto the distance of axis 0 from the joining line L.

It is clear that the above-illustrated embodiment is only one example ofthe practical application of the invention, which is capable of manyother modifications.

What I claim is:

1. A hinge comprising a pair of base plates, each plate having anelongated slot provided therein, one plate having a slide of annularsector profile extending from one face of the plate in the lower portionthereof in alignment with the lower portion of said slot, the otherplate having a slide of annular sector profile extending from one facethereof in alignment with the upper portion of the slot therein andabove the slide extending from the first plate, an intermediate slidemember of annular sector profile and of channel cross section embracingeach slide and circumferentially slidably mounted thereon, and a guidebody of annular sector profile, said guide body having a pair of axiallyspaced upper and lower parallel annular grooves formed therein andopening through annular slots in the inner surface of the body, saidslots being of an axial width less than the axial width of the grooves,said guide body having the intermediate slide member embracing the slideof one plate slidably mounted in the lower groove and the intermediateslide member embracing the slide of the other plate mounted in the uppergroove, said elongated slots in the plates being long and wide enough toenable the guide body and the intermediate slide members to passtherethrough during relative annular sliding motion of the slides,intermediate slide members and the guide body.

2. A hinge comprising a pair of base plates, each plate having anelongated slot provided therein, one plate having a slide of annularsector profile extending from one face of the plate in the lower portionthereof in alignment With the lower portion of said slot, the otherplate having a slide of annular sector profile extending from one face 3thereof in alignment with the upper portion of the slot therein andabove the slide extending from the first plate, an intermediate slidemember of annular sector profile and of channel cross section embracingeach slide and circumferentially slidably mounted thereon, and a guidebody of annular sector profile, said guide body having a pair of axiallyspaced upper and lower parallel annular grooves formed therein andopening through annular slots in the inner surface of the body, saidslots being of an axial width less than the axial width of the grooves,said guide body having the intermediate slide member embracing the slideof one plate slidably mounted in the lower groove and the intermediateslide member embracing the slide of the other plate mounted in the uppergroove, said elongated slots in the plates being long and wide enough toenable the guide body and the intermediate slide members to passtherethrough during relative annular sliding motion of the slides,intermediate slide members and the guide body, and a covering element ofannular sector profile and channel cross section embracing the guidebody and slidably mounted thereon at each end thereof and extendingthrough the slots in the plates, and means interconnecting the coveringelements with the plates to limit movement thereof through the slots inthe plates.

References Cited in the file of this patent UNITED STATES PATENTS629,396 Schuch July 25, 1899 724,962 Soss Apr. 7, 1903 819,098 UnderhillMay 1, 1906 1,648,781 Pepin Nov. 8, 1927 2,056,805 Reichard Oct. 6, 1936FOREIGN PATENTS 202,203 Switzerland Ian. 15, 1939

